blob: 5ed10b0d785f14133b06ade111fc53080c66863f [file] [log] [blame]
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "SoundPool::SoundDecoder"
#include "utils/Log.h"
#include "SoundDecoder.h"
namespace android::soundpool {
// Maximum Samples that can be background decoded before we block the caller.
static constexpr size_t kMaxQueueSize = 128;
// The amount of time we wait for a new Sound decode request
// before the SoundDecoder thread closes.
static constexpr int32_t kWaitTimeBeforeCloseMs = 1000;
SoundDecoder::SoundDecoder(SoundManager* soundManager, size_t threads)
: mSoundManager(soundManager)
{
ALOGV("%s(%p, %zu)", __func__, soundManager, threads);
// ThreadPool is created, but we don't launch any threads.
mThreadPool = std::make_unique<ThreadPool>(
std::min(threads, (size_t)std::thread::hardware_concurrency()),
"SoundDecoder_");
}
SoundDecoder::~SoundDecoder()
{
ALOGV("%s()", __func__);
quit();
}
void SoundDecoder::quit()
{
ALOGV("%s()", __func__);
{
std::lock_guard lock(mLock);
mQuit = true;
mQueueSpaceAvailable.notify_all(); // notify all load waiters
mQueueDataAvailable.notify_all(); // notify all worker threads
}
mThreadPool->quit();
}
void SoundDecoder::run(int32_t id)
{
ALOGV("%s(%d): entering", __func__, id);
std::unique_lock lock(mLock);
while (!mQuit) {
if (mSoundIDs.size() == 0) {
ALOGV("%s(%d): waiting", __func__, id);
mQueueDataAvailable.wait_for(
lock, std::chrono::duration<int32_t, std::milli>(kWaitTimeBeforeCloseMs));
if (mSoundIDs.size() == 0) {
break; // no new sound, exit this thread.
}
continue;
}
const int32_t soundID = mSoundIDs.front();
mSoundIDs.pop_front();
mQueueSpaceAvailable.notify_one();
ALOGV("%s(%d): processing soundID: %d size: %zu", __func__, id, soundID, mSoundIDs.size());
lock.unlock();
std::shared_ptr<Sound> sound = mSoundManager->findSound(soundID);
status_t status = NO_INIT;
if (sound.get() != nullptr) {
status = sound->doLoad();
}
ALOGV("%s(%d): notifying loaded soundID:%d status:%d", __func__, id, soundID, status);
mSoundManager->notify(SoundPoolEvent(SoundPoolEvent::SOUND_LOADED, soundID, status));
lock.lock();
}
ALOGV("%s(%d): exiting", __func__, id);
}
void SoundDecoder::loadSound(int32_t soundID)
{
ALOGV("%s(%d)", __func__, soundID);
size_t pendingSounds;
{
std::unique_lock lock(mLock);
while (mSoundIDs.size() == kMaxQueueSize) {
if (mQuit) return;
ALOGV("%s: waiting soundID: %d size: %zu", __func__, soundID, mSoundIDs.size());
mQueueSpaceAvailable.wait(lock);
}
if (mQuit) return;
mSoundIDs.push_back(soundID);
mQueueDataAvailable.notify_one();
ALOGV("%s: adding soundID: %d size: %zu", __func__, soundID, mSoundIDs.size());
pendingSounds = mSoundIDs.size();
}
// Launch threads as needed. The "as needed" is weakly consistent as we release mLock.
if (pendingSounds > mThreadPool->getActiveThreadCount()) {
const int32_t id = mThreadPool->launch([this](int32_t id) { run(id); });
(void)id; // avoid clang warning -Wunused-variable -Wused-but-marked-unused
ALOGV_IF(id != 0, "%s: launched thread %d", __func__, id);
}
}
} // end namespace android::soundpool